CVE-2021-3019Public exploitNetwork attack vector

Credential disclosure via web-root path traversal

Published Jan 5, 2021 · Updated Aug 3, 2024

Path traversal in ffay lanproxy 0.1 allows remote attackers to read server files and obtain intranet connection credentials. The web interface serves /../conf/config.properties from outside its intended web root, exposing stored proxy credentials. No authentication or user interaction is required, and the published payload also accesses /etc/shadow on the host.

CVSS severity7.5
High
EPSS probability16.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in ffay lanproxy 0.1 allows remote attackers to read server files and obtain intranet connection credentials. The web interface serves /../conf/config.properties from outside its intended web root, exposing stored proxy credentials. No authentication or user interaction is required, and the published payload also accesses /etc/shadow on the host.

The record

CVE
CVE-2021-3019
Published
Jan 5, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1552.001, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1552.001Credentials In Files
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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